Since the release of 19.18, the "Dismiss" option of a suggested workout does not actually dismiss -- it just keeps you in a loop by closing the menu but keeping you on the suggested workout screen. You can go back by pressing the back button but "Dismiss" should actually dismiss. I was disappointed to see this bug was still present in 20.26.
I see there is a previous forum post from 3 years ago about this bug but no response from Garmin.